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From: Paul Brook <paul@codesourcery.com>
Date: Thu, 9 Aug 2012 15:44:41 +0100
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Subject: Re: [Qemu-devel] [PATCH 00/23] Suppress unused default drives
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Evgeny Voevodin <e.voevodin@samsung.com>, qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>, Peter Crosthwaite <peter.crosthwaite@petalogix.com>, Max Filippov <jcmvbkbc@gmail.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Igor Mitsyanko <i.mitsyanko@samsung.com>, Alexander Graf <agraf@suse.de>, Andreas =?utf-8?q?F=C3=A4rber?= <andreas.faerber@web.de>, =?utf-8?q?Herv=C3=A9_Poussineau?= <hpoussin@reactos.org>, Maksim Kozlov <m.kozlov@samsung.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Jan Kiszka <jan.kiszka@web.de>, Blue Swirl <blauwirbel@gmail.com>, Anthony Liguori <aliguori@us.ibm.com>, Mark Langsdorf <mark.langsdorf@calxeda.com>, Michael Walle <michael@walle.cc>, qemu-ppc@nongnu.org, Dmitry Solodkiy <d.solodkiy@samsung.com>, Peter Chubb <peter.chubb@nicta.com.au>, Aurelien Jarno <aurelien@aurel32.net>

> > *can* use it for something entirely else, if=sd notwithstanding:
> >     (qemu) device_add lsi
> >     (qemu) device_add scsi-cd,drive=sd0
> 
> If/when we get a PCI SD card controller model, would all the PCI
> using machines need to be added to take the 'no default sd card'
> setting out again, or does it get overridden anyway if you say
> "and I'd like an sd controller"?

For SD cards we shouldn't need this to start with.  Why are we creating SD 
cards when there's no host controller to connect them to?  Surely we shold be 
able to figure that out automatically.  Especially important for board 
variants with multiple SD interfaces.

Is this all a hangover from before we have proper -drive options?

Paul